How will we get around when the Automobile Age is over?

When we think about the future of transportation, electric and self-driving cars are the flavor of the month. But what if we think about a new transportation era that leaves the car behind? Writing in the Boston Globe , Jeffrey D. Sachs notes that we have been through transportation revolutions before, first with the canal systems of the early 19th century which connected the Atlantic Ocean to the Great Lakes and opened up the midwest. Then the rail revolution put the canals out of business and of course, post World War II, the interstate highway and jet plane put the passenger railways on the ropes. Sachs writes that change might be coming down the road again. Each new wave of infrastructure underpinned a half-century of economic growth. Yet each wave of infrastructure also reached its inherent limits, in part by causing adverse side effects and in part by being overtaken...